having trouble with texturing a roof
You could try re-doing the seams and unwrapping as in the images below so that you are using alot more of the texture.



When editing the UV islands you may find that you will need to flip one of them in the X axis (select island then sclae in the negative X axis, S X -1 ) to get the red ties along the top to line up with each other.



Different Seams but again overlapping islands: